Code Editor

Blyck’s code editor is built on the same Monaco engine as VS Code. LSP language intelligence, inline AI editing, code execution, DB link (SQL autocompletion), and SFTP remote editing are integrated right into your editing flow.

Opening & saving files

Double-click in the file tree or in terminal output to open the editor. You can also create an Untitled file with the new-file button in the tree.

Size policy

File size	Handling
≤ 2MB	Opens in the Monaco editor
2 – 32MB	Read-only viewer (tab shows [read-only])
> 32MB	Prompts you to open with the OS default app

Special formats

Format	Behavior
Images (PNG·JPG·GIF·WebP·SVG, etc.)	Built-in image viewer
PDF	Built-in PDF viewer (up to 32MB)
Markdown (.md)	Toolbar Preview button toggles between rendered HTML ↔ edit mode
Office (xlsx·docx·pptx)	OS default app — remote files are auto-downloaded then launched

Tip

Unsaved files show a ● mark on the tab. Saving with Ctrl+S computes the added/removed line counts and records them automatically in the change history.

Language intelligence (LSP)

Monaco built-in — no install needed

TypeScript and JavaScript work right away with Monaco’s built-in analysis engine. No separate install or configuration.

External LSP servers — auto-installed

Python·Go·Rust·C·C++·C#·Lua·Bash·JSON·YAML and others use dedicated LSP servers. The first time you open a file in such a language, a “Download?” modal appears, and on approval it installs automatically in the background.

Language	LSP server
Python	Pyright
Go	gopls
Rust	rust-analyzer
C / C++	clangd
C#	csharp-ls
Lua	lua-language-server
Bash	bash-language-server
JSON / YAML	vscode-json-language-server / yaml-language-server

Install progress is shown in the UI, and if a server is already on the system PATH it is used preferentially. Otherwise the binary matching your OS/architecture is fetched from npm or a GitHub release and stored inside the app.

Features provided

Feature	Supported
Autocompletion (IntelliSense)	✅
Hover hints (type · signature)	✅
Diagnostics (red underlines for syntax/type errors)	✅
Function signature hints	✅
Bulk symbol rename	✅
Go to definition	✅ (within the same file)

Note

LSP works only on files saved locally. It doesn’t apply to remote SFTP files or Untitled files. Cross-file go-to-definition, debugger (breakpoints, step execution), and Quick Fix are not yet supported.

Inline AI — Ctrl+I

Cursor-style inline editing.

1. Select code (whole file if none) and press Ctrl+I or the toolbar AI (Ctrl+I) button.
2. Type an instruction in the input box near the cursor — “add error handling”, “make it type-safe”. Enter to send, Shift+Enter for a newline, Esc to cancel. You can also change the model (Claude/Codex) in the dropdown on the right of the input box.
3. Before sending, RAG context is searched automatically — it finds related code in the project and passes it to the AI (“Finding related code…” is shown, up to 4 chunks). The result follows the same patterns and conventions.
4. It operates in one of two modes, depending on the first line of the response:
   • MODE:EDIT — A selection shows an inline diff (green/red) + an apply/cancel toolbar; the whole file shows a side-by-side diff modal. On apply, it’s recorded in ChangeSet.
   • MODE:ANSWER — Shown as an explanation/review answer popover with no code change.

Note

While the input box is open, the editor becomes temporarily read-only (to protect the original). Ctrl+I is disabled for read-only files or when AI is not configured.

Applied changes are recorded in the active AI session’s ChangeSet so you can revert them later.

Ctrl+I also works outside the editor — pressing it in a terminal makes the AI analyze the selected output, and in a DB result grid the selected cells are passed as context.

Code execution (▶ Run)

The toolbar ▶ Run button appears only for files saved locally. While running it toggles to ■ Stop.

Automatic project type detection

Marker file	Detected type
package.json	Node.js
go.mod	Go
Cargo.toml	Rust
*.csproj	.NET
pyproject.toml / setup.py	Python / pytest
Makefile	Make
CMakeLists.txt	CMake
(single file)	Per-language script execution

Output panel

• Shows the run command ($), standard output (white), and standard error (red) in real time (up to 5,000 lines).
• Problem Matcher — Parses errors in the filename:line pattern and shows them as red markers in the editor. Clicking jumps straight to that line.

Tip

In AI Chat’s Auto mode (🚀), the AI runs with the run_observe tool → checks failures → fixes, autonomously in a loop. See Run & Preview for details.

SQL autocompletion inside code (DB link)

When writing SQL literals in a code file, you can use schema-based autocompletion from an open DB connection.

1. Select a connection in the DB dropdown on the right of the toolbar to link it.
2. Autocompletion is enabled in SQL literals inside the code (embedded SQL or SQL scratchpad conditions).
   • Table suggestions after FROM/JOIN/UPDATE/INTO
   • Column suggestions after tablename.
3. A ▶ Run in DB code lens appears above the SQL statement. On click:
   • Queries (SELECT): runs immediately and shows results
   • DML/DDL: runs after a confirmation modal

Note

If there are no connections in the DB dropdown, first connect to a DB from the DB Client panel. The dropdown refreshes to the latest connection list each time it’s opened.

SFTP remote editing

Opening a remote file from the Terminal · SSH · SFTP tree shows it in the Monaco editor. Saving with Ctrl+S immediately uploads to the remote and records the change in history.

Caution

Remote file editing has the following limitations:

• LSP language intelligence not applied (remote search is possible)
• ▶ Run button disabled (works only in local projects)
• Git diff shown only for local files
• 2MB size limit

File tree

The left file tree (Ctrl+Shift+E) handles both local and SFTP remote the same way.

• git status badges — ? untracked, + staged, - deleted, ! conflict (local tree only)
• New file · new folder · refresh, F2 rename, Delete to delete
• Ctrl+C / Ctrl+X / Ctrl+V to copy/cut/paste (multiple files can be selected)
• Double-clicking a filename in terminal output also opens the editor

Project-wide search — Ctrl+Shift+G

• Search text across the whole project (case-insensitive, up to 500 files at a time)
• SFTP remote folders are searched too
• Replacement comes in two forms — Replace Selected (only selected results) / Replace All — going through an “N files, M places replaced” confirmation modal before running

Note

Project-wide search is literal (character-for-character) matching. Regex search is supported in in-file search (Ctrl+F) and terminal scrollback search.

The AI operates the editor directly

AI Chat not only is aware of the active editor’s visible code, selection, and cursor position, but can also inject code directly into the editor with the editor_inject tool. Request review mode and it shows a diff card (Apply/Reject) for you to decide, instead of applying immediately.

For details, see AI Chat & RAG Search.

Editor shortcuts

Key	Action
Ctrl+I	Inline AI editing
Ctrl+S	Save (upload if remote)
Ctrl+F	In-file search (regex supported)
Ctrl+H	In-file search & replace
Ctrl+Shift+G	Project-wide search & replace
Ctrl+L	Attach the current file to AI Chat
Esc	Return to the file tree
Ctrl+K	RAG search
Ctrl+Shift+H	Change history (ChangeSet)
Ctrl+= / Ctrl+- / Ctrl+0	Editor font enlarge/shrink/reset

FAQ

Q. LSP autocompletion doesn’t work. → Check that it’s a file with the right language extension. If a “Download?” modal appears on first open, you must approve it to install. Remote SFTP files don’t support LSP.

Q. The ▶ Run button isn’t visible. → Remote files and Untitled files have no run button. It appears only for files saved locally.

Q. There are no connections in the DB dropdown. → First connect to a DB from the DB Client panel. The dropdown refreshes to the latest list each time it’s opened.

Q. Markdown preview doesn’t work. → Open a .md file in the editor and a preview button appears in the toolbar. Click it to switch to rendered HTML.

Q. I saved a remote file but it didn’t upload. → Check the SFTP connection state. The connection in the Terminal · SSH · SFTP tree must be alive for Ctrl+S to auto-upload.

Q. I want to revert after applying inline AI. → Open ChangeSet with Ctrl+Shift+H and press the revert button for that item. See Change History & Git for details.